Home page of the microscope service parts, repair and spare parts online catalog - Sermik-Oplatek Mikroskopservice Dresden f.n.n.Z

Description of this part for the microscope.

the longer of the two in the stage - that works together with the larger pinion of the stage manipulator and is responsible for moving the specimen sideways.

Basic data of this rack:
Length of the rack: 91 mm
Number of teeth: 62
Material: brass
How it is fixed: with 2 screws, which are included
Removed from: the mechanical stage PZO SK14
Which microscope this stage worked with: the PZO Biolar microscope

Important: there are two racks of different length in the PZO SK14 microscope stage. The one I am offering here is the longer one, responsible for the transverse movement, that is for moving the specimen sideways. This is not the shorter rack responsible for moving the stage surface back and forth.

Please note: SK14 is a stage model made by the PZO company (SK = Stolik Krzyżowy, that is mechanical stage). The marking of this model (the marking "SK14") is on the stage. This stage was most often mounted on PZO Biolar microscopes, which carry no model name. As a result "SK14" is the only marking found on the microscope, and many people use the name "PZO SK14" - wrongly - for the whole microscope. This is a mistake: PZO SK14 is a stage model, not a microscope model.

The SK14 microscope stage this rack comes from was mounted in a PZO Biolar B microscope. However, the same stage model was also used in other models of the Biolar microscope and in other microscopes made by this manufacturer, for example:
- PZO Biolar DIC
- PZO Biolar B2
- PZO Biolar GF
- PZO MB 30
- PZO Studar

A practical note on fitting: this mechanism needs a very tacky grease. If you need some, I will add it to the parcel - just write to me.

This item is not a spare part for repairing a microscope. It is a component of the microscope stage - and the stage can be used with any compatible PZO microscope.

Detailed photos of this rack are available in the gallery. Every photo shows a scale with a millimetre division. The last photo shows the whole PZO SK14 microscope stage, with an arrow pointing at the component in question and at where it sits in the stage, so that this part can be identified without any doubt.

Description of this part for the microscope.

this case are the dimensions of these clips, because they let the user make sure that the clips will fit the microscope stage he owns - from any manufacturer:
Length: 50 mm
Width: 7 mm
Diameter of the mounting pin: 4 mm (+/- 0.3 mm, because the pin is slotted inside and can be expanded / squeezed)
Height (pin measured together with the head): 18 mm
Diameter of the head: 9 mm

These all-metal clips are widely used to replace missing parts in many older microscopes during restoration - regardless of the manufacturer and the model of the microscope.

ЛОМО supplied such clips with the following microscopes, among others:
- Lomo M-9
- Lomo МБИ-1 (MBI-1)
- Lomo MBP-1 (MBR-1)
- Lomo Erudit (ЛОМО Эрудит)
- Lomo Biolam Д1 / Д2 / Д3 (D series - portable)
- Lomo Biolam C1 / C2 / C3 (S series - for students)
- Lomo Biolam P1 / P2 / P3 / P4 (R series - working microscopes)
- Lomo Biolam models (ЛОМО Биолам) with the micro fine focus adjustment built into the base (that is, with a two-digit model number, Дxx / Cxx / Pxx)
- as well as those microscopes sold in Germany under the Bresser brand (Bresser Biolam / Bresser Erudit), including the newest ones with illumination integrated into the base
- and the same microscopes sold in the U.K. under the Zenith brand
- Lomo Biolam 70
- Lomo Micmed 1

ЛОМО marked the series in Cyrillic letters, so the letter engraved on the microscope does not always mean what it seems to mean at first glance: Д stands for the Latin D, but the Russian C is read as S and the Russian P as R.

The same models in the notation used on Western markets:
- Lomo Biolam D-1 / D-2 / D-3
- Lomo Biolam S-1 / S-2 / S-3
- Lomo Biolam R-1 / R-2 / R-3 / R-4

Users use various names for this part. All of them mean the same thing: the clips on the microscope stage that hold the slide with the specimen in place. These include:
- stage clips
- microscope stage clips
- slide clips
- spring clips
- stage spring clips
- specimen clips
- specimen spring clips
- slide holder clips
- object clamps

In the last photo in the gallery you can see the complete Lomo Biolam R-1 microscope. In that photo I point out with an arrow where these clips are located on the microscope - so that it is completely clear which part is meant.

In the "compatibility" section I list only a few models of microscopes that these clips fit. It is definitely not a complete list.

Description of this part for the microscope.

This is the rack - the longer of the two in the stage - that works together with the inner pinion of the stage manipulator (https://www.microscopeparts.eu/part/99973), that is with the pinion of smaller diameter, and is responsible for moving the specimen holder with the spring clip sideways.

Basic data of this rack:
Length of the rack: 80 mm
Width of the rack: 12 mm
Number of teeth: 59
Material: brass (this matters, because the shorter rack is made of plastic)
How it is fixed: with 2 screws, which are included
Removed from: the mechanical XY stage Zeiss 45 35 10
Which microscope this stage worked with: the Zeiss Axiolab re 45 09 05 microscope

Important: there are two racks of different length in the Zeiss 453510 microscope stage. The one I am offering here is the longer one, made of brass, responsible for the transverse movement of the specimen holder. This is not the shorter plastic rack responsible for moving the stage plate in the front-back plane.

The stage this rack comes from was mounted in a Zeiss Axiolab re microscope, P/N 45 09 05 (also written as 450905). However, the same stage model is also mounted on the following variants:
- Zeiss Axiolab drb KT, which carries the same number 45 09 05 (450905)
- Zeiss Axiolab E re, 45 09 07 (450907)
- Zeiss Axiolab A, 45 09 09 (450909)
- Zeiss Axiolab Pol, 45 09 10 (450910)

This item is not a spare part for repairing a microscope. It is a component of the microscope stage - and the stage can be used with any compatible Zeiss microscope, and even with others, onto whose stage carrier such a stage can be fitted or screwed on.

Detailed photos of this rack are available in the gallery. Every photo shows a scale with a millimetre division. The last photo shows the whole Zeiss 453510 microscope stage, with an arrow pointing at the component in question and at where it sits in the stage, so that this part can be identified without any doubt.

Description of this part for the microscope.

these guides:
Number of guides in the set: 2
Material: the guides are made of aluminium
Number of bearing balls: 13 per guide
Length of the guide: 114 mm
Width of the guide: 6 mm
Removed from: the mechanical stage PZO SK14
Which microscope this stage worked with: the PZO Biolar microscope

Important: these are longitudinal guides. They are responsible for moving the stage surface back and forth. They are not transverse guides for moving the specimen holder sideways - because the PZO SK14 stage, unlike many other stages, has NO transverse guides.

Please note: SK14 is a stage model made by the PZO company (SK = Stolik Krzyżowy, that is mechanical stage). The marking of this model (the marking "SK14") is on the stage. This stage was most often mounted on PZO Biolar microscopes, which carry no model name. As a result "SK14" is the only marking found on the microscope, and many people use the name "PZO SK14" - wrongly - for the whole microscope. This is a mistake: PZO SK14 is a stage model, not a microscope model.

The SK14 microscope stage these guides come from was mounted in a PZO Biolar B microscope. However, the same stage model was also used in other models of the Biolar microscope and in other microscopes made by this manufacturer, for example:
- PZO Biolar DIC
- PZO Biolar B2
- PZO Biolar GF
- PZO MB 30
- PZO Studar

This item is not a spare part for repairing a microscope. It is a component of the microscope stage - and the stage can be used with any compatible PZO microscope.

Detailed photos of these guides are available in the gallery. Every photo shows a scale with a millimetre division. The last photo shows the whole PZO SK14 microscope stage, with an arrow pointing at the component in question and at where it sits in the stage, so that this part can be identified without any doubt.

Description of this part for the microscope.

This is the rack that works together with the outer (larger) pinion of the stage manipulator (https://www.microscopeparts.eu/part/99973) and is responsible for moving the stage surface in the front-back axis.

Basic data of this rack:
Length of the rack: 55 mm
Number of teeth: 35
Material: plastic
How it is fixed: with 2 hex socket screws, which are included
Removed from: the mechanical XY stage Zeiss 45 35 10
Which microscope this stage worked with: the Zeiss Axiolab re 45 09 05 microscope

Important: there are two racks of different length in the Zeiss 453510 microscope stage. The one I am offering here is the shorter one, responsible for the longitudinal movement, that is for moving the stage surface back and forth. This rack is not responsible for moving the specimen holder sideways.

The stage this rack comes from was mounted in a Zeiss Axiolab re microscope, P/N 45 09 05 (also written as 450905). However, the same stage model is also mounted on the following variants:
- Zeiss Axiolab drb KT, which carries the same number 45 09 05 (450905)
- Zeiss Axiolab E re, 45 09 07 (450907)
- Zeiss Axiolab A, 45 09 09 (450909)
- Zeiss Axiolab Pol, 45 09 10 (450910)

This item is not a spare part for repairing a microscope. It is a component of the microscope stage - and the stage can be used with any compatible Zeiss microscope, and even with others, onto whose stage carrier such a stage can be fitted or screwed on.

Detailed photos of this rack are available in the gallery. Every photo shows a scale with a millimetre division. The last photo shows the whole Zeiss 453510 microscope stage, with an arrow pointing at the component in question and at where it sits in the stage, so that this part can be identified without any doubt.

Description of this part for the microscope.

microscope stage, allowing precise movement of the specimen in both the X and Y axes of the stage surface. The manipulator consists of two coaxial knobs and two coaxial drive shafts - an outer one and an inner one, ending in separate pinions of different diameters.

This particular manipulator was removed from the Zeiss 453510 microscope stage (the number is also written as: 45 35 10). The last photo in the gallery shows the whole stage it comes from.

On the second-hand market and in service documentation one encounters many names referring to this assembly. The most commonly used terms include, among others:
- stage manipulator
- XY stage manipulator
- mechanical stage drive
- stage control knobs
- specimen mover
- coaxial stage drive
- stage drive assembly
- mechanical stage control
- manual XY stage drive
- stage actuator mechanism

Such manipulators are very often damaged mechanically while the microscope is being transported. Because they stick out beyond the outline of the stand, they are the first to take the energy of the impact when the instrument falls or is packed badly.

In many cases it is not the whole manipulator that gets damaged, but only one of its parts. Most often these are the knobs, the drive shafts, the coaxial sleeves or the fixing elements. That is why this database also holds all the most important components of this (and other) manipulators, offered separately as service parts.

Damage to the manipulator does not make further work with the microscope impossible. The specimen can be moved by hand, or a simple specimen holder without the XY movement can be fitted. Such a solution works at low magnifications, but when working with objectives above 40x (for example 60x, 63x, 80x or 100x) precise movement of the specimen by hand becomes very difficult. At total magnifications above roughly 400x even a small movement of the hand shifts the image by a considerable distance in the field of view. The mechanical manipulator allows very smooth, controlled and repeatable movement of the specimen in both axes, which matters especially during observation with oil immersion and when making photographic documentation.

The stage this manipulator comes from was mounted in a Zeiss Axiolab re microscope, P/N 45 09 05 (also written as 450905). However, the same stage model is also mounted on the following variants:
- Zeiss Axiolab drb KT, which carries the same number 45 09 05 (450905)
- Zeiss Axiolab E re, 45 09 07 (450907)
- Zeiss Axiolab A, 45 09 09 (450909)
- Zeiss Axiolab Pol, 45 09 10 (450910)

This item is not a spare part for repairing a microscope. It is a component of the microscope stage - and the stage can be used with any compatible Zeiss microscope, and even with others, onto whose stage carrier such a stage can be fitted or screwed on.

Detailed photos of this manipulator are available in the gallery. Every photo shows a scale with a millimetre division. The last photo shows the whole Zeiss 453510 microscope stage, with an arrow pointing at the component in question and at where it sits in the stage, so that this part can be identified without any doubt.

Description of this part for the microscope.

Basic data of these guides:
Number of guides in the set: 2
Material: the guides are made of plastic
Number of bearing balls: 10 per guide
Length of the guide: 43 mm
Removed from: the mechanical XY stage Zeiss 45 35 10
Which microscope this stage worked with: the Zeiss Axiolab re 45 09 05 microscope

Important: these are not transverse guides. The guides I am offering here are responsible for moving the stage surface back and forth. These guides are not responsible for moving the specimen holder sideways.

The stage these guides come from was mounted in a Zeiss Axiolab re microscope, P/N 45 09 05 (also written as 450905). However, the same stage model is also mounted on the following variants:
- Zeiss Axiolab drb KT, which carries the same number 45 09 05 (450905)
- Zeiss Axiolab E re, 45 09 07 (450907)
- Zeiss Axiolab A, 45 09 09 (450909)
- Zeiss Axiolab Pol, 45 09 10 (450910)

This item is not a spare part for repairing a microscope. It is a component of the microscope stage - and the stage can be used with any compatible Zeiss microscope, and even with others, onto whose stage carrier such a stage can be fitted or screwed on.

Detailed photos of these guides are available in the gallery. Every photo shows a scale with a millimetre division. The last photo shows the whole Zeiss 453510 microscope stage, with an arrow pointing at the component in question and at where it sits in the stage, so that this part can be identified without any doubt.

Description of this part for the microscope.

the same poster, but in German: https://www.microscopeparts.eu/part/99964.

The poster shows in table form how the individual series of Lomo Biolam microscopes differ from each other, and what the differences are between the individual models within each series.

This comparison table was printed in the second half of the 1970s. It contains a comparison of the following microscope models:
- Lomo Biolam Д1 / Д2 / Д3 (series "D" - portable)
- Lomo Biolam C1 / C2 / C3 (series "S" - student)
- Lomo Biolam P1 / P2 / P3 / P4 / P5 / P6 / P7 (series "R" - working)

Lomo Biolam models with the fine focus built into the base (that is, with a two-digit model number, Дxx / Cxx / Pxx) did not exist yet at that time and are not shown on this poster.

ЛОМО marked the series in Cyrillic, which is why the letter engraved on the microscope does not always mean what it seems to at first glance: Д is the Latin D, but the Russian C reads as S and the Russian P as R.

The same models in the notation found on Western markets:
- Lomo Biolam D-1 / D-2 / D-3
- Lomo Biolam S-1 / S-2 / S-3
- Lomo Biolam R-1 / R-2 / R-3 / R-4 / R-5 / R-6 / R-7

Description of this part for the microscope.

but in Russian: https://www.microscopeparts.eu/part/99965.

The poster shows in table form how the individual series of Lomo Biolam microscopes differ from each other, and what the differences are between the individual models within each series.

This comparison table was printed in the second half of the 1970s. It contains a comparison of the following microscope models:
- Lomo Biolam Д1 / Д2 / Д3 (series "D" - portable)
- Lomo Biolam C1 / C2 / C3 (series "S" - student)
- Lomo Biolam P1 / P2 / P3 / P4 / P5 / P6 / P7 (series "R" - working)

Lomo Biolam models with the fine focus built into the base (that is, with a two-digit model number, Дxx / Cxx / Pxx) did not exist yet at that time and are not shown on this poster.

ЛОМО marked the series in Cyrillic, which is why the letter engraved on the microscope does not always mean what it seems to at first glance: Д is the Latin D, but the Russian C reads as S and the Russian P as R.

The same models in the notation found on Western markets:
- Lomo Biolam D-1 / D-2 / D-3
- Lomo Biolam S-1 / S-2 / S-3
- Lomo Biolam R-1 / R-2 / R-3 / R-4 / R-5 / R-6 / R-7

Description of this part for the microscope.

pages.

User's manual in German: https://www.microscopeparts.eu/part/99966.

This edition of the booklet was supplied with the microscopes:
- Lomo Biolam Д1 / Д2 / Д3 (series "D" - portable)
- Lomo Biolam C1 / C2 / C3 (series "S" - student)
- Lomo Biolam P1 / P2 / P3 / P4 / P5 / P6 / P7 (series "R" - working)

Lomo Biolam models with the fine focus built into the base (that is, with a two-digit model number, Дxx / Cxx / Pxx) did not exist yet at that time.

ЛОМО marked the series in Cyrillic, which is why the letter engraved on the microscope does not always mean what it seems to at first glance: Д is the Latin D, but the Russian C reads as S and the Russian P as R.

The same models in the notation found on Western markets:
- Lomo Biolam D-1 / D-2 / D-3
- Lomo Biolam S-1 / S-2 / S-3
- Lomo Biolam R-1 / R-2 / R-3 / R-4 / R-5 / R-6 / R-7

Description of this part for the microscope.

Russian: https://www.microscopeparts.eu/part/99967.

This edition of the booklet was supplied with the microscopes:
- Lomo Biolam Д1 / Д2 / Д3 (series "D" - portable)
- Lomo Biolam C1 / C2 / C3 (series "S" - student)
- Lomo Biolam P1 / P2 / P3 / P4 / P5 / P6 / P7 (series "R" - working)

Lomo Biolam models with the fine focus built into the base (that is, with a two-digit model number, Дxx / Cxx / Pxx) did not exist yet at that time.

ЛОМО marked the series in Cyrillic, which is why the letter engraved on the microscope does not always mean what it seems to at first glance: Д is the Latin D, but the Russian C reads as S and the Russian P as R.

The same models in the notation found on Western markets:
- Lomo Biolam D-1 / D-2 / D-3
- Lomo Biolam S-1 / S-2 / S-3
- Lomo Biolam R-1 / R-2 / R-3 / R-4 / R-5 / R-6 / R-7

Description of this part for the microscope.

microscopes:
- Lomo Erudit (ЛОМО Эрудит)
- Lomo Biolam Д1 / Д2 / Д3 (D series - portable)
- Lomo Biolam C1 / C2 / C3 (S series - for students)
- Lomo Biolam P1 / P2 / P3 / P4 / P5 / P6 / P7 (R series - working microscopes)
- Lomo Biolam models with the fine focus built into the base (that is, with a two-digit model number, Дxx / Cxx / Pxx)
- as well as those microscopes sold in Germany under the Bresser brand (Bresser Biolam / Bresser Erudit), including the newest ones with illumination integrated into the base
- and the same microscopes sold in the U.K. under the Zenith brand
- Lomo Biolam 70
- Lomo Micmed 1

ЛОМО marked the series in Cyrillic letters, so the letter engraved on the microscope does not always mean what it seems to mean at first glance: Д stands for the Latin D, but the Russian C is read as S and the Russian P as R.

The same models in Latin script:
- Lomo Biolam D-1 / D-2 / D-3
- Lomo Biolam S-1 / S-2 / S-3
- Lomo Biolam R-1 / R-2 / R-3 / R-4 / R-5 / R-6 / R-7
- Lomo Biolam D-11 / D-12 / D-13
- Lomo Biolam S-11 / S-12 / S-13
- Lomo Biolam R-11 / R-12 / R-13 / R-14 / R-15 / R-16 / R-17

Internal dimensions of this case:
Height: 325 mm
Depth: 250 mm
Width: 185 mm

This wooden microscope case has everything it should have:
- a metal handle
- a drawer for eyepieces, objective cases and accessories
- four rubber feet
- a hinged door
- a lock
- but unfortunately no key

Someone may find it interesting that this case was made in 1977 and is still in excellent condition!

This model of case is very often used to store other models of microscopes, not only those made by ЛОМО.

On the market, many different names are used for a wooden case for a microscope. These include:
- wooden case
- wooden box
- wooden crate
- wooden housing
- wooden cabinet
- microscope case
- microscope box
- microscope cabinet
- transport case
- transport box
- carrying case
- carrying box
- storage case
- storage box
- dust cover case
- protective case
- instrument case
- shipping crate

Description of this part for the microscope.

IM 35 and Zeiss ICM 405 inverted microscopes, focusing is done by raising and lowering the nosepiece with the objectives. To make that possible - the nosepiece sits on a shaft that travels out of and back into the inside of the microscope body through an opening in the housing. To keep dirt from reaching the mechanism by that same route - the opening is protected with a rubber seal.

This is exactly the seal I offer here, together with its mounting plate.

The same nosepiece movement mechanism and the same way of keeping dust out with a rubber seal are used in the Zeiss Axiovert 10 / 35 / 405 M inverted microscopes - but whether the seal from the IM 35 / ICM 405 models fits those, I was not able to confirm. It is quite possible - but before you decide to use this seal on an Axiovert series microscope - compare its shape and dimensions carefully (a millimetre scale is visible in the photos).

Over the years this rubber seal often gets damaged, and then you can either fit something improvised - or replace it with an original, which, as in this case - is only available on the secondhand market.

The last photo in the gallery shows the body of the Zeiss IM 35 microscope, with an arrow pointing to where this rubber seal sits in the microscope. This allows the part described here to be identified beyond any doubt.

Description of this part for the microscope.

Zeiss Axiolab microscopes - as in most microscopes of the Axio series (among others Axioskop, Axioplan, Axiophot) - the stages are not permanently fixed with screws. They are interchangeable and are fitted onto the stage carrier, which has the form of a clamp. So that the stage can be fitted onto such a carrier, the stages have a dovetail ring on the underside, with a diameter matching the carrier.

Here I am offering exactly such a dovetail ring, removed from the underside of the Zeiss 453510 stage (the number is also written as: 45 35 10).

Basic data of this mounting ring:
Diameter: 98 mm
Width of the ring: 9 mm
Height (how far it stands out above the stage surface): 6 mm
How it is fixed to the bottom plate of the stage: with 4 screws
Removed from: the mechanical XY stage Zeiss 45 35 10
Which microscope this stage worked with: the Zeiss Axiolab re 45 09 05 microscope

The stage this ring comes from was mounted in a Zeiss Axiolab re microscope, P/N 45 09 05 (also written as 450905). However, the same stage model is also mounted on the following variants:
- Zeiss Axiolab drb KT, which carries the same number 45 09 05 (450905)
- Zeiss Axiolab E re, 45 09 07 (450907)
- Zeiss Axiolab A, 45 09 09 (450909)
- Zeiss Axiolab Pol, 45 09 10 (450910)

This item is not a spare part for repairing a microscope. It is a component of the microscope stage - and the stage can be used with any microscope onto whose stage carrier a stage with a 98 mm mounting ring can be fitted.

In a separate section, visible below, I describe a few possible uses for this ring.

Description of this part for the microscope.

32000002
451749-8170
Hoffmann + Krippner

The ribbon cable to the main board is included as well.

The last photos in the gallery show where this keypad was removed from. There you will see:
- the complete Zeiss Axiovert Bedienpult 45 17 49 unit (the number is also written as 451749)
- the nameplate of this unit
- a photo of this unit with the cover removed, where an arrow shows the position of this part

Description of this part for the microscope.

1003
Number on the bottom side of the PCB: 451949-1003

This electronic PCB contains, among other things:
- seven-segment displays
- indicator lamps backlighting the buttons
- NEC D8279C-2 keyboard controller
- ribbon cable

The last photos in the gallery show where this PCB with the displays was removed from. There you will see:
- the complete Zeiss Axiovert Bedienpult 45 17 49 unit (the number is also written as 451749)
- the nameplate of this unit
- a photo of this unit with the cover removed, where an arrow shows the position of this module

Description of this part for the microscope.

It is its UPPER HOUSING PART.
There are no cables, circuit boards or buttons inside.

The last photos in the gallery show where this cover was taken from. There you will see:
- the complete Zeiss Axiovert Bedienpult 45 17 49 unit (the number is also written as 451749), with an arrow pointing to this very housing part
- the nameplate of the whole unit

Description of this part for the microscope.

label attached to this module:
POWER ENTRY MODULE 9107
6VM4S
F7360A
6A,120V 47-440HZ
4A,250V
MADE IN MEXICO U.S. PAT. 4488201

and on the etched PCB:
70-2586-AB
REV 3

The Zeiss Axiovert Bedienpult 45 17 49 control console (the number is also written as 451749) and also Kamerabedienpult 45 19 49 has no ordinary socket for plugging in the mains cable. Instead, this is where the Corcom 6VM4S module sits, combining four functions in one housing: an IEC C14 mains socket, a 0-1 rocker switch (on / off), a holder for two 5x20 mm fuses and a removable voltage selector card.

Please note: this particular unit is currently set to 220V - keep that in mind and if necessary set the correct input voltage before putting it to work in your Axiovert Bedienpult.

The last photos in the gallery show where this module was removed from. There you will see:
- the complete Zeiss Axiovert Bedienpult 45 17 49 unit
- its nameplate
- a photo of this unit with the cover removed, where an arrow shows the position of this module

Description of this part for the microscope.

integrated circuit:
Design: EPROM in DIP package, 28-pin
Material: ceramic package
Zeiss catalogue part number: 451749-0602.010
Software version: V1.3/7019.123 M
Software date: 18.12.90
Code: compatible with Intel 8085

This chip worked on the main board Zeiss 451949-9211-020 (also written as: 45 19 49 - 9211 - 020).

The chip was pulled out of its socket - it was never soldered. Please note: the silver stripe printed on top of the package marks pin 1.

The last photos in the gallery show where it was removed from. There you will see:
- the complete Zeiss Axiovert Bedienpult 45 17 49 unit
- its nameplate
- a photo of the main board with an arrow showing where this chip is located

Description of this part for the microscope.

circuit:
Design: integrated circuit in DIP package, 16-pin
Material: plastic package
Zeiss catalogue part number: 451749-0601

This IC worked on the main board Zeiss 451949-9211-020 (also written as: 45 19 49 - 9211 - 020) with the software in 451749-0602.010, version V1.3/7019.123 M (date: 18.12.90)

The IC was pulled out of its socket - it was never soldered.

The last photos in the gallery show where it was removed from. There you will see:
- the complete Zeiss Axiovert Bedienpult 45 17 49 unit
- its nameplate
- a photo of the main board with an arrow showing where this IC is located

Description of this part for the microscope.

Zeiss
Lettering: white "Zeiss" wordmark in the typeface introduced together with the joint logo of both Zeiss companies (Zeiss Oberkochen and Carl Zeiss Jena) in 1993/94
Material: aluminium, thin sheet with embossed lettering
Colour: the so-called early light blue, used by the manufacturer until 1997
Dimensions: 23 mm x 23 mm
Mounting: the plate is glued on

This is the plate variant with the logo introduced in 1993/94 and in use until 1997: light blue, a square with the lens cut out at the bottom, lettering in rounded letters. You can see the previous version here: https://www.microscopeparts.eu/part/99868.

Because the adhesive that held these plates to the microscope body loses its grip over the years, such plates sometimes fall off. Sometimes they are also deliberately prised out. A plate like this lets you bring your microscope back to its factory appearance using original parts.

Description of this part for the microscope.

addition onto the main objective.

This auxiliary objective fits the following stereo microscopes:
- PZO MST-130
- PZO MST-131
- PZO MST-132

Please note: this lens fits the PZO MST-132 microscopes made by the so-called "old PZO". It does not fit the microscopes sold today under the name "PZO MST-132 Lab 4". You can see what the "Lab 4" model looks like on the distributor's website (I write "distributor" and not "manufacturer", because the company using the "PZO" logo sells microscopes made in China - status and active URL as of October 2026) https://pzo.waw.pl/oferta/mikroskopy-stereoskopowe/ze-statywem-kolumnowym/mikroskop-stereoskopowy-mst-132-lab-4.

In PZO MST stereo microscopes the 0.6x auxiliary objective serves several purposes:
- it reduces the total magnification obtained
- it increases the field of view
- it increases the working distance (and this is its main purpose)

According to the manual this auxiliary optic increases the working distance to 165 mm, but in reality (measured) it is about 150 mm, because the thickness of the additional lens has to be subtracted from the theoretical figures.

Description of this part for the microscope.

These eyepieces fit stereo microscopes of any manufacturer, provided they use eyepieces with a 34 mm mounting diameter, for example:
- PZO MST-1 / MST-2
- PZO MST-130 / MST-131 / MST-132
- PZO MST ZOOM
- PZO KLP-21 / KLP-22 colposcopes
- DIY devices (for example instruments for the artificial insemination of queen bees) built around PZO MST stereo microscopes
- Meopta DM23
- Carl Zeiss Jena SM-XX (the so-called SM-20)
- medical microscopes by Carl Zeiss Jena (for example ophthalmic slit lamps) built around SM-XX stereo microscopes

These eyepieces do not fit microscopes whose eyepiece diameter is other than 34 mm:
- they do not fit the PZO MST-110 / MST-127 stereo microscopes, because those use eyepieces with a 23.2 mm diameter
- they do not fit the Lomo MBC-1 / MBC-2 stereo microscopes, because those use eyepieces with a 30 mm diameter
- they do not fit the Lomo MBC-9 / MBC-10 stereo microscopes, because those use eyepieces with a 32 mm diameter
- they do not fit the Carl Zeiss Jena Technival / Citoval stereo microscopes, because those use eyepieces with a 23.2 mm diameter
- they do not fit the Carl Zeiss West Germany stereo microscopes, because those use eyepieces with a 30 mm diameter
- they do not fit the Euromex E series and Z series stereo microscopes, because those use eyepieces with a 30.5 mm diameter
- they do not fit the Hertel & Reuss STE series stereo microscopes, because those use eyepieces with a 31 mm diameter

PZO 10x/25 eyepieces reach very high prices on the second-hand market. If you own a PZO MST-130 stereo microscope or a compatible one without eyepieces and you need any pair of eyepieces at all to get the microscope working - then the following PZO eyepieces with a 34 mm mounting diameter are commonly available on the market:
- PZO 6.3x
- PZO 12x (also in a version with a linear or grid reticle)
- PZO WF 20x
- PZO 25x

Description of this part for the microscope.

The large gear wheel transfers the movement from the shaft that the user turns with the knobs - and on the smaller pinion runs the brass toothed rack (https://www.microscopeparts.eu/part/99943), raising and lowering the stage with the specimen.

In the Zeiss Axiolab microscope these wheels are mounted on the housing casting on a relatively thin axle (it is included in the set offered here), and even the slightest bend of that axle makes the gear turn unevenly.

This gear wheel was removed from a Zeiss Axiolab re microscope, P/N 45 09 05 (also written as 450905). However, it also fits the following variants:
- Zeiss Axiolab drb KT, which carries the same number 45 09 05 (450905)
- Zeiss Axiolab E re, 45 09 07 (450907)
- Zeiss Axiolab A, 45 09 09 (450909)
- Zeiss Axiolab Pol, 45 09 10 (450910)

I was not able to confirm this, but in my opinion it is very likely that the focusing gear wheel from the Zeiss Axiolab microscope also fits the following microscopes:
- Zeiss Standard 20
- Zeiss Standard 25 ICS
- Zeiss Axiostar
- Zeiss Axioskop 20
It may also fit the inverted microscope Zeiss Axiovert 25.

Description of this part for the microscope.

fixed to the casting number 6527 with two hex socket screws. This is the casting of the stage carrier, because in the Axiolab focusing is done by lowering and raising the condenser and stage unit. The screws that hold the rack to this casting are included in the set offered here.

This toothed rack was removed from a Zeiss Axiolab re microscope, P/N 45 09 05 (also written as 450905). However, it also fits the following variants:
- Zeiss Axiolab drb KT, which carries the same number 45 09 05 (450905)
- Zeiss Axiolab E re, 45 09 07 (450907)
- Zeiss Axiolab A, 45 09 09 (450909)
- Zeiss Axiolab Pol, 45 09 10 (450910)

I was not able to confirm this, but in my opinion it is very likely that the focusing rack from the Zeiss Axiolab microscope also fits the following microscopes:
- Zeiss Standard 20
- Zeiss Standard 25 ICS
- Zeiss Axiostar
- Zeiss Axioskop 20
It may also fit the inverted microscope Zeiss Axiovert 25.

The teeth of this rack can be damaged quite easily, because the whole rack is made of soft brass - and it runs against a hard steel pinion.

Description of this part for the microscope.

which sits on the outside of the microscope housing
- the potentiometer
- the 3-wire cable with a flat plug

Purpose: brightness control of the 6V 20W-25W and 30W halogen bulb. This potentiometer has to work together with the electronics of the transformer built into the microscope body.

This potentiometer was removed from a Zeiss Axiolab re microscope, P/N 45 09 05 (also written as 450905). However, it also fits the following variants:
- Zeiss Axiolab drb KT, which carries the same number 45 09 05 (450905)
- Zeiss Axiolab E re, 45 09 07 (450907)
- Zeiss Axiolab A, 45 09 09 (450909)
- Zeiss Axiolab Pol, 45 09 10 (450910)

I was not able to confirm this, but in my opinion it is very likely that the potentiometer from the Zeiss Axiolab microscope also fits the following microscopes:
- Zeiss Standard 20
- Zeiss Standard 25 ICS
- Zeiss Axiostar
- Zeiss Axioskop 20
- Zeiss Axiovert 25

The part offered here can be a remedy for the following problems with a Zeiss microscope:
- if the illumination intensity control in the microscope has stopped working completely (but be careful, the cause may also lie on the side of the electronics)
- if the bulb flickers while you adjust the brightness
- if, for example, due to mechanical damage the knob has broken off your potentiometer

The last photo shows the stand of the Zeiss Axiolab re microscope, with an arrow pointing at the place on the microscope housing where the knob controlling this potentiometer is located.

Description of this part for the microscope.

P/N 45 09 05 (also written as 450905). However, it also fits the following variants:
- Zeiss Axiolab drb KT, which carries the same number 45 09 05 (450905)
- Zeiss Axiolab E re, 45 09 07 (450907)
- Zeiss Axiolab A (reflected light), 45 09 09 (450909)
- Zeiss Axiolab Pol, 45 09 10 (450910)

The knob carries a collar with a 0-360 scale, which is an angular measure describing one full turn of the knob.

The knob is mounted on the shaft (the shaft inside the stand body that connects the knobs on the right and the left side of the microscope) with a small grub screw, which is included.

I was not able to confirm this, but in my opinion it is very likely that this knob also fits the following microscopes:
- Zeiss Standard 20
- Zeiss Standard 25 ICS
- Zeiss Axiostar
- Zeiss Axioskop 20
- Zeiss Axiovert 25

The Carl Zeiss Axiolab microscope has two such knobs. Both are identical, so there is no difference between the right and the left knob. I am offering each of these knobs separately (one at a time).

The last photo shows the stand of the Zeiss Axiolab microscope, with an arrow pointing at the knobs in question.

Description of this part for the microscope.

written: 450905). It also fits the following variants:
- Zeiss Axiolab drb KT, which carries the same number 45 09 05 (450905)
- Zeiss Axiolab E re, 45 09 07 (450907)
- Zeiss Axiolab A, (reflected light), 45 09 09 (450909)

The Zeiss Axiolab Pol (P/N 45 09 10) comes from the factory with a pol nosepiece, meaning each objective position can be centred. Mechanically, the nosepiece offered here can be fitted to a Zeiss Axiolab Pol - but centring the objectives will not be possible. It is still a workable stopgap if an Axiolab Pol urgently needs to run again, especially when no pol objectives are going to be used.

Please note: the visually very (!) similar microscopes:
- Zeiss Standard 20
- Zeiss Standard 25 ICS
- Zeiss Axiostar
have DIFFERENT (!) nosepieces, and the one from the Zeiss Axiolab will NOT (!) fit them.

This nosepiece is fastened to the microscope arm with three screws (they are included in the set offered here), it is screwed onto the microscope arm from above, and the screws sit in the recess of the head mount.

The housing that forms one unit with this nosepiece has two slots for sliders. Two empty plastic sliders are included and can be seen in the gallery photos.

Several different names are in use for this part. They all mean the same thing, among them:
- revolving nosepiece
- objective turret
- objective nosepiece
- nosepiece turret
- objective changer

In the last gallery photo you will see a Zeiss Axiolab re with an arrow marking which part is meant and where it sits on the microscope. That makes it unambiguous to identify.

Description of this part for the microscope.

P/N 45 09 05 (also written: 450905). It also fits the following variants:
- Zeiss Axiolab drb KT, which carries the same number 45 09 05 (450905)
- Zeiss Axiolab E re, 45 09 07 (450907)
- Zeiss Axiolab Pol, 45 09 10 (450910)

This is the plate that the transformer electronics are originally screwed to from the inside (if the microscope has them). What I offer here is the plate only - the bare cover - nothing more.

Many people treat the cover plate and the power supply as one single part. So when the power supply burns out, it is usually unscrewed together with the plate - and taken to the repair shop that way. If the power supply cannot be saved, it often never comes back... and unfortunately neither does the body cover.

In that case the options are:
- cut the cover yourself out of cardboard
- print the cover on a 3D printer
- or simply buy an original cover, like the one offered here.

Description of this part for the microscope.

5
Magnification: 5x
Field number F.N.: 25
Mounting diameter: 23.2 mm

Please note: PLI is a series of projection eyepieces assigned to the CFI60 system (optics corrected for infinity / "I" as in "infinity"). I have, however, personally seen eyepieces from this series used on microscopes with optics corrected for a finite tube length (160 mm, to be precise).

This eyepiece contains no chromatic correction lenses, so that correction has to be built into the objective (in the case of Nikon objectives these are the CF / CFN / CFI series).

The standard 23.2 mm mounting diameter allows it to be used in the projection tubes of many microscopes from various manufacturers - both biological and stereo ones. It therefore has to be regarded as a very universal projection eyepiece. In the "compatibility" section I list only a small part of the microscopes this photo eyepiece can be used with.

From the experience of people I know, only testing a projection eyepiece yourself on a specific microscope setup gives you certainty about how it will behave.

With every configuration - different objectives, a different tube length, a different photo adapter, camera, DSLR, sensor size - the user will get a different result.

This applies to tests both on microscopes with finite tube length optics (for example the Nikon Alphaphot with 160 mm optics) and infinity optics (for example the Nikon Eclipse TS-100 infinity), and both on older stereo microscopes (for example the Nikon SMZ-2T) and somewhat newer ones such as the Nikon SMZ-18.

Description of this part for the microscope.

5x
Magnification: 2.5x
Mounting diameter: 23.2 mm

Please note: this is a "CF" projection photo eyepiece, meaning "Chrome Free" (chromatic aberration free). The eyepiece itself carries no chromatic correction - for correct results it has to sit in the microscope objective. In the case of Nikon, those are the CF (CFN) and CFI objectives.

The standard 23.2 mm mounting diameter allows it to be used in the projection tubes of many microscopes from various manufacturers - both biological and stereo ones.

It has to be said that this is a very universal projection eyepiece. In the "compatibility" section I list only a small part of the microscopes this photo eyepiece can be used with.

From the experience of people I know, only testing a projection eyepiece yourself on a specific microscope setup gives you certainty about how it will behave.

With every configuration - different objectives, a different tube length, a different photo adapter, camera, DSLR, sensor size - the user will get a different result.

This applies to tests both on microscopes with finite tube length optics (for example the Nikon Labophot with 160 mm optics) and infinity optics (for example the Nikon Eclipse E600 infinity), and both on older stereo microscopes (for example the Nikon SMZ-10) and somewhat newer ones such as the Nikon SMZ-1500.

Description of this part for the microscope.

microscopes, a so-called "objective pair"
Magnification: 2.5x
Anti-reflective coating: yes, this is an objective carrying the red letter "T", i.e. T-coated

On the black plastic housing the magnification is written as "2,5" - unlike the older versions of such objectives (made for the Stereomikroskop XII model), where the format used was "2 1/2" (see here: https://www.microscopeparts.eu/part/91035)

In stereo microscopes built on the Greenough principle, what is called "the microscope objective" is in fact a pair (two pieces) of objectives set at a specific angle to each other. This is exactly why the housings of older examples of such objectives (more precisely: the common housing covering the pair of objectives) carried two serial numbers. Each of these objectives simply had its own individual serial number. Such a case can be seen on this 1.25x objective: https://www.microscopeparts.eu/part/00654.

This technical design has a very interesting consequence - each single objective, once taken out of the housing, becomes an interesting choice for anyone working in macro photography, all the more so because these are usually low-magnification objectives, which are exactly what macro photography looks for.

Since the 1930s Carl Zeiss Jena has produced many models and variants of stereo microscopes, and this objective will fit the vast majority of them, because the way they are mounted is the same throughout.

Several names are in use on the market for the stereo microscope this objective comes from:
- Carl Zeiss Jena Stereomikroskop XVI
- Carl Zeiss Jena Präpariermikroskop XVI
- Carl Zeiss Jena Stereomikroskop PM XVI
- Carl Zeiss Jena SM XVI
- Carl Zeiss Jena PM XVI

Sometimes, to avoid Roman numerals, you also come across the spellings "SM-16" and "PM-16".

Interestingly, in the instruction manual from 1954 available online (https://www.microscopemuseum.eu/catalogues/Carl_Zeiss_1954_Stereomikroskop_PM_XVI.pdf), the header on page 3 reads "Stereomikroskop PH XVI". I do not know whether this is an OCR error or an original misprint, but it means that this (incorrect) name may be in circulation as well - and all of the names listed above refer to one and the same microscope.

Description of this part for the microscope.

two parts:
- aluminium clamping sleeve, split along its whole length, which is inserted into the hole in the mounting block of the head holder
- screw with a three-lobe knob, driven in from the outside

This clamping sleeve comes from the head holder for the Nissho Optical 209 microscope (the complete holder is available here https://www.microscopeparts.eu/part/91077).

It is very likely that Nissho Optical (NSK for short) uses identical sleeves across the whole series of stereo microscope head holders it manufactured.

Without this part the holder with the stereo microscope head cannot be clamped precisely at a given height on the stand.

The last photo in the gallery shows the measurement of the pillar that the stereo microscope head holder is fitted onto, and in which this clamping sleeve belongs. The pillar has an unusual diameter - 24 mm - and this matters to anyone who would like to use the sleeve in other microscopes.

Description of this part for the microscope.

is inserted into (in this model it is in fact the objective that goes in there)
- clamping screw that holds the microscope in the collar
- rack along which the microscope moves up and down inside the collar (also available separately https://www.microscopeparts.eu/part/91079)
- knobs that produce this movement, that is the focusing knobs (also available separately https://www.microscopeparts.eu/part/91063)
- internal shaft with a pinion that converts the rotary movement into vertical movement along the rack (also available separately https://www.microscopeparts.eu/part/91064)
- mounting block with a hole for fitting it onto the stand pillar
- inside the hole there is a split clamping sleeve with a screw driven in from the outside, locking the whole holder at the required height (also available separately)

Basic parameters of this holder:
Inner diameter of the collar: 50 mm (yes - 50 mm is not a mistake, this diameter is not commonly used on the market)
Diameter of the hole for the stand pillar: 24 mm (yes - 24 mm. This is not a measuring error)

Since these are unusual dimensions and you may suspect a measuring error, the gallery contains photos taken with a caliper as well as a photo of the stand pillar. The pillar is not part of this offer, but I do have it - if you need it, that is no problem :)

It is very likely that Nissho Optical (NSK for short) uses identical holders across the whole series of stereo microscopes it manufactured.

Description of this part for the microscope.

condensers have an upper, swing-out lens. When it is in the light path, the condenser offers N.A. 0.9. With the top lens swung out, the condenser works at a low numerical aperture of N.A. 0.16 (values from 0.16 to 0.2 are quoted on the internet). It is exactly this arm that does the swinging, and it is what I offer here: it holds the top lens in its mount above the condenser body and at the same time lets you swing it out of the light path.

In the BH2-SC / U-SC condensers this arm with its mount is a single casting together with the lever the user grips. The whole part is fastened to the condenser housing with a single screw (included). The lens sits in the mount without a thread and is clamped by three screws - you can see it and read its description here: https://www.microscopeparts.eu/part/99924.

The inner diameter of the mount is 23 mm.

Please note: originally there was a rubber sleeve on the small lever, which you grip with your fingers, so that the grip is firmer and the fingers do not slip. It is missing here - it must have been lost somewhere during use. It is a removable, replaceable item. If you have a damaged arm in an old condenser and you are looking for a replacement - do not throw away your old rubber, you can move it over without any trouble.

The working position of the whole arm with the top lens is set by a pair of stops - the small screw on the arm rests against the screw in the body. Thanks to this the lens locks in the same place every time it comes back and does not have to be centred again each time.

This particular part was removed from an Olympus BH2-SC condenser taken out of an Olympus BH-2 BHS microscope.

I could not confirm this, but everything indicates that this arm will also fit the microscope condensers for Olympus BX microscopes:
- Olympus U-SC
- Olympus U-SC-2
- Olympus U-SC3

The microscope condensers listed above are sometimes referred to collectively as:
- Olympus Achromat 0.9 flip-out condenser
- Olympus 0.9 swing-out condenser

Before you decide to use this arm in a condenser other than the one it was removed from - compare its appearance and dimensions carefully.

What goes wrong in this mechanism? Here is an example list of problems that can be solved by replacing the arm:
- the arm wobbles on its axis when the pivot screw is loose or worn
- the lens stops returning to its place when the stop screw has been unscrewed or lost, for example during cleaning
- the lens mount gets damaged when someone tries to force the lens out without undoing the three screws
- the casting cracks when the condenser is dropped - the arm sticks out beyond the outline and takes the impact first

This arm is not a spare part for a microscope. It is a part for repairing or rebuilding the condenser - and that condenser can sit in various microscopes.

When replacing the arm with another one, bear in mind that the stop for the working position sits on the arm itself. A new arm will most probably have to be readjusted with that one screw until the lens sets itself exactly on the axis of the light path.

When the arm is swung out, there is no optics left above the iris diaphragm - only the protective glass cemented into the body remains (https://www.microscopeparts.eu/part/99926). It is what then protects the diaphragm blades (https://www.microscopeparts.eu/part/99927) from dirt falling from the stage.

Here are examples of microscope models in which the condensers that this arm fits are most often used:
- Olympus BH-2: BHS / BHT / BHTU
- Olympus BX: BX40 / BX50 / BX51 / BX60

The most important microscopes used with the condenser models mentioned here are listed in the "compatibility" section, but this is by no means a complete list.

The last photos show the microscope condenser that the arm offered here comes from - and a blue arrow points to the part I am talking about.

A curiosity: it is possible that this part also fits the Meiji MA976 microscope condenser.

Description of this part for the microscope.

condensers have an upper, swing-out lens. When it is in the light path, the condenser offers N.A. 0.9. With the top lens swung out, the condenser works at a low numerical aperture of N.A. 0.16 (values from 0.16 to 0.2 are quoted on the internet). This swing-out lens sits in a mount on the swing arm and is held by three screws. The seating diameter is 23 mm and the seat itself has no thread, unlike for example the top lenses in the Olympus U-UCD condenser.

It is exactly this part that I offer here, that is the top achromatic 0.9 lens for use without immersion oil (dry).

This particular lens was removed from an Olympus BH2-SC condenser taken out of an Olympus BH-2 BHS microscope.

I could not confirm this, but everything indicates that this top lens will also fit the microscope condensers for Olympus BX microscopes:
- Olympus U-SC
- Olympus U-SC-2
- Olympus U-SC3

The microscope condensers listed above are sometimes referred to collectively as:
- Olympus Achromat 0.9 flip-out condenser
- Olympus 0.9 swing-out condenser

Before you decide to use this lens in a condenser other than the one it was removed from - compare their appearance and dimensions carefully.

A note on the appearance of the top lens: sometimes a white protective cap is fitted over the top lens. It is an original Olympus item and it changes how the top lens looks - not only the colour of the mount (from black to white) but also its shape (from a cone to a flatter form). It is still the same lens, not a different, white one.

This top lens is not a spare part for a microscope. It is a part for repairing or rebuilding the condenser - and that condenser can sit in various microscopes.

Here are examples of microscope models in which the condensers that this top lens fits are most often used:
- Olympus BH-2: BHS / BHT / BHTU
- Olympus BX: BX40 / BX50 / BX51 / BX60

The most important microscopes used with the condenser models mentioned here are listed in the "compatibility" section, but this is by no means a complete list.

The last photos show the microscope condenser that the top lens offered here comes from.

A curiosity: it is possible that this part also fits the Meiji MA976 microscope condenser.

Description of this part for the microscope.

SC microscope condensers have an upper, swing-out lens. When it is in the light path, the condenser offers N.A. 0.9. With the top lens swung out, the condenser works at a low numerical aperture of N.A. 0.16 (values from 0.16 to 0.2 are quoted on the internet). In fact such a low N.A. is achieved with the iris diaphragm alone, without any lens at all - but in these condensers Olympus fitted a protective glass (a round glass disc) protecting the diaphragm from dirt that could fall into it from above (for example from the stage) and damage it. This glass is cemented into the conical casting that forms the condenser body.

It is exactly this part that I offer here, that is the protective glass (the so-called zero glass) cemented into its housing.

This particular part was removed from an Olympus BH2-SC condenser taken out of an Olympus BH-2 BHS microscope.

I could not confirm this, but everything indicates that this protective glass will also fit the microscope condensers for Olympus BX microscopes:
- Olympus U-SC
- Olympus U-SC-2
- Olympus U-SC3

The microscope condensers listed above are sometimes referred to collectively as:
- Olympus Achromat 0.9 flip-out condenser
- Olympus 0.9 swing-out condenser

Before you decide to use this glass with its housing to repair a condenser other than the one it was removed from - compare their appearance and dimensions carefully.

This glass is damaged quite often:
- it can get scratched during cleaning
- it can crack due to stress
- it can get broken during unprotected storage or in transit

The glass protecting the diaphragm is not a spare part for a microscope. It is a part for repairing the condenser - and that condenser can sit in various microscopes.

Here are examples of microscope models in which the condensers that this glass fits are most often used:
- Olympus BH-2: BHS / BHT / BHTU
- Olympus BX: BX40 / BX50 / BX51 / BX60

The most important microscopes used with the condenser models mentioned here are listed in the "compatibility" section, but this is by no means a complete list.

The last photos show the microscope condenser that the glass with its mount offered here comes from.

A curiosity: it is possible that this part also fits the Meiji MA976 microscope condenser.

Description of this part for the microscope.

following microscopes:
- Carl Zeiss Jena Jenaval
- Carl Zeiss Jena Jenalumar
- Carl Zeiss Jena Jenapol
- Carl Zeiss Jena Jenavert

Each of these discs has 5 seats that take filters of 32 mm diameter. The filters are locked in place by a springy retaining ring (a so-called Sprengring) so that they cannot fall out. The set offered here comes with 10 such rings. Since each wheel can be loaded with five filters, the total number of possible combinations is 25.

At the moment these filter seats are empty. Neither wheel has any filters fitted - you are free to load them with whatever filters you like.

This two-wheel module fits halogen, HBO and XBO lamphouses.

Parts made by Carl Zeiss Jena, cast or injection moulded from ZnAl alloy, carry their own numbers by which they can be identified. This double filter revolver module consists of 3 cast components:
- 2672 Si10 CZ - the frame carrying both wheels. It is at the same time the outer cover plate with which the whole module is screwed onto the lamphouse
- 2957 Si10 CZ - the thick filter wheel
- and note: the thin filter wheel also carries the number 2957 Si10 CZ, which is unusual for this manufacturer - that two parts differing in dimensions should share the same number

This double filter wheel is sometimes also called:
- double filter holder
- double filter turret
- dual filter carrier
- double filter slider
- double filter changer

Here https://www.microscopeparts.eu/part/99693 you can see what a complete 6V 25W halogen illuminator looks like with a single filter wheel fitted. The double set offered here fits such an illuminator among others, so the single filter wheel from the illuminator of a Carl Zeiss Jena Jenaval microscope can, for example, be replaced by the double one.

Description of this part for the microscope.

so additional optics in the form of a tube lens are needed to create the intermediate image. In this case it has to be a lens with a focal length of 180 mm, the same as in the Motic CCIS system - and unlike the Zeiss ICS system (also infinity, used among others in the Axio series microscopes), whose tube lens has a focal length of 164.5 mm.

This lens was removed from the Zeiss 415500-1400-000 binocular head, but it also fits the model with a built-in digital camera and the model with a trino port (phototube). So it fits:
- the Zeiss 415500-1400-000 binocular head
- the Zeiss 415500-1401-000 binocular head with trinocular phototube
- the Zeiss 415500-1402-000 binocular head with built-in digital camera

In the Primostar series the tube lens is placed in the two-part microscope head. This head consists of the angled tube and the eyepiece head screwed onto it. The tube lens sits in the lower part of the tube, at the joint with the microscope body, inside the ring dovetail.

Description of this part for the microscope.

covers that close the internal interpupillary distance adjustment mechanism from the front (https://www.microscopeparts.eu/part/99929). The second, right cover is shaped differently and is a separate item (https://www.microscopeparts.eu/part/99931).

The interpupillary scale is printed on the left cover - there is no printing on the right cover. When the interpupillary distance is changed, the right cover covers or uncovers part of the left cover and with it part of the scale placed there - and this is how the interpupillary distance value is read.

The cover is made of plastic and is screwed with four screws directly to the brass carrier plate, to which the eyepiece tube (https://www.microscopeparts.eu/part/99928) is also fastened.

This cover was removed from the Leitz Wetzlar binocular head P/N 512821/20 (also written 512 821) - but exactly the same one is used in other models of binocular and trinocular heads as well.

The same front panel design is found in, among others, the Leitz 512 923/20 and Leitz 512 815 trinocular heads - this cover will most likely fit those too.

Before you decide to use this cover in a Leitz Wetzlar head other than model 512 821/20, first compare the exact dimensions (the photos show a millimetre scale), and if you have any doubts, ask in internet groups and forums.

This is a service part for a microscope head - not for a specific microscope model. Such a head can be mounted on many Leitz Wetzlar microscope models (and even on microscopes from other makers), so no list of microscopes this cover fits can be given - it fits the head, and the user mounts the head wherever he wants.

In the "compatibility" section I list a few example Leitz Wetzlar microscope models that turn up on the second-hand market complete with the head this cover comes from - but this is definitely not a complete list. They include:
- Leitz Wetzlar Dialux 20 / Dialux 22 EB
- Leitz Wetzlar Laborlux K / Laborlux S
- Leitz Wetzlar Diaplan

On the last photos in the gallery you can see the Leitz Wetzlar 512821/20 binocular head, and with arrows I try to show which part this is and where it sits in the head.

Description of this part for the microscope.

internal interpupillary distance adjustment mechanism from the front (https://www.microscopeparts.eu/part/99929). The second, left cover is shaped differently and is a separate item (https://www.microscopeparts.eu/part/99930).

There is no printing on the right cover - the interpupillary scale is printed on the left cover. When the interpupillary distance is changed, the right cover covers or uncovers part of the left cover and with it part of the scale placed there - and this is how the interpupillary distance value is read.

The cover is made of plastic and is screwed with four screws directly to the brass carrier plate, to which the eyepiece tube (https://www.microscopeparts.eu/part/99928) is also fastened.

This cover was removed from the Leitz Wetzlar binocular head P/N 512821/20 (also written 512 821) - but exactly the same one is used in other models of binocular and trinocular heads as well.

The same front panel design is found in, among others, the Leitz 512 923/20 and Leitz 512 815 trinocular heads - this cover will most likely fit those too.

Before you decide to use this cover in a Leitz Wetzlar head other than model 512 821/20, first compare the exact dimensions (the photos show a millimetre scale), and if you have any doubts, ask in internet groups and forums.

This is a service part for a microscope head - not for a specific microscope model. Such a head can be mounted on many Leitz Wetzlar microscope models (and even on microscopes from other makers), so no list of microscopes this cover fits can be given - it fits the head, and the user mounts the head wherever he wants.

In the "compatibility" section I list a few example Leitz Wetzlar microscope models that turn up on the second-hand market complete with the head this cover comes from - but this is definitely not a complete list. They include:
- Leitz Wetzlar Dialux 20 / Dialux 22 EB
- Leitz Wetzlar Laborlux K / Laborlux S
- Leitz Wetzlar Diaplan

On the last photos in the gallery you can see the Leitz Wetzlar 512821/20 binocular head, and with arrows I try to show which part this is and where it sits in the head.

Description of this part for the microscope.

of:
- two brass carrier plates, each with a round seat for the eyepiece tube (it is to these plates that the tubes https://www.microscopeparts.eu/part/99928 are screwed)
- a central scissor lever made of plastic, with its fixing screw
- two pressure springs (one for each brass plate)

Turning the central lever moves both brass plates outwards symmetrically. It is exactly this constant work of the plastic central lever against the brass plates that wears the plastic lever out - and then it has to be replaced.

This mechanism was removed from the Leitz Wetzlar binocular head P/N 512821/20 (also written 512 821) - but exactly the same one is used in other models of binocular and trinocular heads as well.

The same front panel design is found in, among others, the Leitz 512 923/20 and Leitz 512 815 trinocular heads - this interpupillary mechanism will most likely fit those too.

From the outside this mechanism is covered by plastic covers - one on the right (https://www.microscopeparts.eu/part/99931) and a different one on the left (https://www.microscopeparts.eu/part/99930). These plastic covers carry a printed scale on which the interpupillary distance is read.

Before you decide to use this mechanism in a Leitz Wetzlar head other than model 512 821/20, first compare the exact dimensions (the photos show a millimetre scale), and if you have any doubts, ask in internet groups and forums.

This is a service part for a microscope head - not for a specific microscope model. Such a head can be mounted on many Leitz Wetzlar microscope models (and even on microscopes from other makers), so no list of microscopes this mechanism fits can be given - it fits the head, and the user mounts the head wherever he wants.

In the "compatibility" section I list a few example Leitz Wetzlar microscope models that turn up on the second-hand market complete with the head this mechanism comes from - but this is definitely not a complete list. They include:
- Leitz Wetzlar Dialux 20 / Dialux 22 EB
- Leitz Wetzlar Laborlux K / Laborlux S
- Leitz Wetzlar Diaplan

On the last photos in the gallery you can see the Leitz Wetzlar 512821/20 binocular head, and with arrows I try to show which part this is and where it sits in the head.

Description of this part for the microscope.

Wetzlar binocular head P/N 512821/20 (also written 512 821) - but exactly the same tube is used in other models of binocular and trinocular heads as well.

The same front panel design is found in, among others, the Leitz 512 923/20 and Leitz 512 815 trinocular heads - this tube with diopter adjustment will most likely fit those too.

Diameter of the eyepieces it takes: 23.2 mm.

In the Leitz bino 512821/20 both the left and the right tube have diopter adjustment. They are mechanically identical parts - there is no difference between the left and the right tube. They can be swapped.

Before you decide to use this tube in a Leitz Wetzlar head other than model 512 821/20, first compare the exact dimensions (the photos show a millimetre scale), and if you have any doubts, ask in internet groups and forums.

This is a service part for a microscope head - not for a specific microscope model. Such a head can be mounted on many Leitz Wetzlar microscope models (and even on microscopes from other makers), so no list of microscopes this tube fits can be given - it fits the head, and the user mounts the head wherever he wants.

In the "compatibility" section I list a few example Leitz Wetzlar microscope models that turn up on the second-hand market complete with the head this tube comes from - but this is definitely not a complete list. They include:
- Leitz Wetzlar Dialux 20 / Dialux 22 EB
- Leitz Wetzlar Laborlux K / Laborlux S
- Leitz Wetzlar Diaplan

On the last photos in the gallery you can see the Leitz Wetzlar 512821/20 binocular head taken apart, with an arrow pointing to which part this is and where it sits in the head. That makes it unambiguous to identify.

Description of this part for the microscope.

mm
Distance between the pins: 26 mm
How the distance was measured: from the centre of one pin to the centre of the other
How the pins are fitted: one on the underside, the other facing outward
Pin width: 2 mm

These particular blades were removed from an Olympus BH2-SC condenser taken out of an Olympus BH-2 BHS microscope.

I could not confirm this, but everything indicates that these blades will also fit the iris diaphragms in the following microscope condensers for Olympus BX microscopes:
- Olympus U-SC
- Olympus U-SC-2
- Olympus U-SC3

The microscope condensers listed above are sometimes referred to collectively as:
- Olympus Achromat 0.9 flip-out condenser
- Olympus 0.9 swing-out condenser

Before you decide to use these diaphragm blades to repair a condenser other than the one they were removed from - compare their appearance and dimensions carefully.

It is quite possible that Olympus, like many other manufacturers, used the same diaphragm blades in most microscope condensers of that era, for example:
- Olympus U-POC
- Olympus U-PCD
- Olympus U-AAC
- Olympus U-UCD

Damaged iris diaphragm blades are one of the more common faults in microscopes. It usually happens when:
- the grease in the mechanism that opens and closes the diaphragm has dried out and the user tries to force it
- a foreign body gets between the blades (for example a chip of glass from a broken slide)
- the diaphragm is closed too quickly or opened too far

In the BH2-SC / U-SC condensers the iris diaphragm sits inside the condenser housing, it is not a separate part screwed on underneath. It follows that if the iris diaphragm fails you can:
- leave the damaged diaphragm in place and not use the condenser to its full potential
- replace the whole condenser
- repair the diaphragm by replacing the damaged blades

These separate diaphragm blades are not a spare part for a microscope. They are parts for repairing the diaphragm in a microscope condenser - and that condenser can sit in various microscopes.

Here are examples of microscope models in which the condenser models are most often used whose iris diaphragms the blades offered here fit:
- Olympus BH-2: BHS / BHT / BHTU
- Olympus BX: BX40 / BX50 / BX51 / BX60

The most important microscopes used with the condenser models mentioned here are listed in the "compatibility" section, but this is by no means a complete list.

The last photos show the microscope condenser from whose diaphragm the blades offered here were taken.

A curiosity: it is possible that these blades also fit the iris diaphragm of the Meiji MA976 microscope condenser.

Description of this part for the microscope.

bayonet (a dovetail in ring form) inside the objective. In other words, it is the lens in the objective that sits closest to the microscope body.

The spelling MBC-10 is a common but incorrect transliteration from Cyrillic (original spelling: МБС-10). The Latin-alphabet equivalent of this name is MBS-10. People who do not read Cyrillic often write the name of this microscope as MGC-10.

Basic parameters of this lens:
Manufacturer: LZOS Lytkarino (Лыткарино)
Note on the manufacturer: LOMO (ЛОМО) is commonly but incorrectly given as the manufacturer
Lens name: rear lens
Correction type: the lens is a component of an achromatic objective
Focal length of the complete objective: f = 90 mm
Optical system type: this lens is part of a CMO - a common main objective (a single objective for both stereo paths)

This lens does not fit the f=190mm objective of this microscope.

The MBS-10 microscope was also sold under the names:
- OGME-P3
- SF-100 (on the US market)
- Silver Connection MBC-10 (mainly on the German market)
These are exactly the same microscopes, so this lens also fits the objectives of models sold under those names.

Note that this lens does not fit the objectives of the MBS-1 / MBS-2 / MBS-9 stereo microscopes (nor those of the MPS polarising stereo microscopes), and it does not fit any biological microscope - not even biological LOMO microscopes.

Description of this part for the microscope.

PZO - a company that existed until 2005, although it had ended mass production about a decade earlier.

Basic parameters of this binocular head:
Manufacturer: PZO Poland
Series: MND
Own magnification: 1.25x
Diameter of accepted eyepieces: 23.2 mm
Diopter adjustment: yes, on one of the eyepiece tubes
Interpupillary distance adjustment: yes
Mounting to the microscope tube: circular dovetail, 43 mm diameter
Intended for: all PZO Studar microscope models and the newer MS, MB and ML series models
Housing color: black (this matters, because the newer models are white)

By default this model of the binocular head was fitted to PZO Studar microscopes. It also suits other PZO microscope models:
- all models of the PZO Studar student microscopes
- PZO MB biological microscopes, for example PZO MB-10 and PZO MB-30
- PZO MS school microscopes, for example PZO MS-4
- PZO ML laboratory microscopes, for example PZO ML-5 or PZO ML-6

When you use this binocular head on PZO MS / ML and MB microscopes, keep in mind that these microscopes were sold by default with the PZO MND-4 binocular head of 1.5x own magnification. With a head of 1.25x own magnification the total magnification obtained on the microscope will change.

Although this binocular head mechanically fits PZO Biolar microscopes - I do not recommend it. Other PZO binocular heads are intended for PZO Biolar microscopes.

Please note that PZO Biolar and PZO Studar microscopes look very similar to each other, and most of them carry no model name. A comparison of some PZO Studar models can be found here: https://www.facebook.com/MikroskopyPZO/posts/pfbid0WuTZtq8gD6snUH83vbze3ek1FcV6du22uoBBoHjN57H6Wz1gYUHcXoqGtPCs2mVVl

Users call this part by many different names, but all of them mean the same thing. Here are some of them:
- microscope binocular head
- binocular viewing head
- binocular observation head
- microscope binocular tube
- binocular eyepiece tube
- microscope binocular body
- bino head
- eyepiece head
- microscope head
- stereo head (although this is a wrong use of that name)
- binoculars (although this is a wrong use of that name, binoculars are field glasses)

Description of this part for the microscope.

version has a photo output in the form of a tube that takes a photo eyepiece (https://www.microscopeparts.eu/part/99891).

At the back of the head there is a switch that selects whether the image from the right or from the left optical path is sent to the trinocular output. On the outside this is done by a short knob. It shifts the set of mirrors sitting inside the head. This complete module is what is offered here.

This is an element exposed to many kinds of damage:
- the knob can get lost after unscrewing
- the knob can break off
- the mirrors can come loose from the metal frame they are glued to, and then they crack or chip easily
- the reflective surface of the mirrors can oxidise

In that case the best solution is to replace the whole module and in this way regain the ability to take photos with the stereo microscope.

The last photos in the gallery have an arrow marking which element this is and where exactly it sits in the head of the stereo microscope. This allows unambiguous identification.

Description of this part for the microscope.

The tube transfers the image from the objectives through the whole stand to the head mount. This part has no counterpart in upright biological microscopes.

There is no catalogue number anywhere on this part. That may suggest the manufacturer did not intend it as a part to be replaced by the user, one that could be ordered from service.

The last photos in the gallery show the stand of the Carl Zeiss Axiovert 100M microscope, with an arrow pointing to the place where this part is located. This allows you to identify it without any doubt.

I was not able to confirm it, but it is possible that this tube with optics also fits the inverted microscopes Zeiss Axiovert 135 / 135M. Before you decide to use it in the Axiovert 135 / 135M models, please check this on forums or groups devoted to Zeiss microscopes.

Description of this part for the microscope.

objectives are corrected for infinity, so an intermediate optic in the form of a tube lens is required to create the intermediate image. In this case it has to be a lens of the Zeiss ICS system with a focal length of 164.5 mm.

In this series of inverted microscopes the tube lens sits below the nosepiece. The last photos in the gallery show the stand of the Carl Zeiss Axiovert 100M microscope, with an arrow pointing to the exact place where this lens is located. This allows you to identify the part without any doubt.

According to the manufacturer this is not a part intended to be replaced by the user, so there is no catalogue number either on the lens mount or on the aluminium profile into which this lens is screwed.

I was not able to confirm it, but it is possible that this ICS tube lens also fits the inverted microscopes Zeiss Axiovert 135 / 135M. Before you decide to use it in the Axiovert 135 / 135M models, please check this on forums or groups devoted to Zeiss microscopes.

Description of this part for the microscope.

Carl Zeiss Jena NU microscope (this socket carries the number 44 in the instruction manual). It measures the brightness of the image, from which the exposure time for photographs is determined.

The instruction manual for the Carl Zeiss Jena NU microscope is made available by the excellent site mikroskop-online.de here: https://www.mikroskop-online.de/mikroskope/wp-content/uploads/simple-file-list/Mikroskop-Bedienanleitungen-Druckschriften-Carl-Zeiss-Jena-Mikroskopen/30-040-1_G-Grosses-Universal-Forschungsmikroskop-NU-T.pdf

Description of this part for the microscope.

filter:
Manufacturer: Carl Zeiss Jena
Model: U204g
Filter type: glass excitation filter for UV fluorescence (the manufacturer calls it Erregerfilter)
Glass type: UG 1
Diameter: 32 mm
Thickness: 2 mm
Colour: black-violet, passes very little visible light
Toughened version: yes

The g at the end of the designation stands for the German gehärtet, meaning toughened. The manufacturer gave it to filters meant to work right next to high-power lamps, especially HBO mercury burners, where ordinary glass does not withstand the high temperature. With a UV excitation filter this matters especially, because it sits at the hottest point of the whole path and absorbs most of the burner energy.

Filters 32 mm in diameter can be used in most microscopes from many manufacturers. In Carl Zeiss Jena microscopes they can be used, among others, in the following fluorescence microscopes:
- Carl Zeiss Jena Jenamed Fluorescence (Fluoreszenz)
- Carl Zeiss Jena Jenalumar
- Carl Zeiss Jena Fluoval / Fluoval-2
- Carl Zeiss Jena Laboval Fluorescence

The manufacturer catalogue gives the following transmission values for this glass at 2 mm thickness:
- 0.015 at 302 nm
- 0.093 at 312 nm
- 0.435 at 334 nm
- 0.644 at 366 nm

Across the whole visible range, from 405 to 644 nm, transmission is zero. This means the filter works almost entirely on the 366 nm mercury line, exactly where the HBO burner is strongest in the ultraviolet.

One property of this glass is worth knowing: above 700 nm it starts to transmit again, and at 750 nm transmission reaches 0.210. This infrared leak is invisible to the eye, but it heats the specimen and spoils contrast in photographs.

In the excitation path U204 is also combined with a red-absorbing filter. The manufacturer documentation shows such a pair with the B226 filter, which cleans up the excitation band further.

The same UG 1 glass was supplied in two thicknesses, each with its own designation:
- The Carl Zeiss Jena U204 filter is UG 1 glass 2 mm thick
- The Carl Zeiss Jena U205 filter is UG 1 glass 4 mm thick

The thicker U205 cuts more sharply, but passes about a third less energy on the 366 nm line, so the image is noticeably darker.

A safety note: this filter passes ultraviolet, which is invisible and harmful to the eyes. When working with it, never look into the illumination path without a barrier filter in place.

Description of this part for the microscope.

Carl Zeiss Jena
Model: B229g
Filter type: red-absorbing glass filter (the manufacturer calls it Rotsperrfilter)
Diameter: 32 mm
Colour: blue
Toughened version: yes

The "g" at the end of the designation stands for the German gehärtet, meaning toughened. The manufacturer gave it to filters meant to work right next to high-power lamps, especially HBO mercury burners, where ordinary glass does not withstand the high temperature.

Filters 32 mm in diameter can be used in most microscopes from many manufacturers. In Carl Zeiss Jena microscopes they can be used, among others, in the following fluorescence microscopes:
- Carl Zeiss Jena Jenamed Fluorescence (Fluoreszenz)
- Carl Zeiss Jena Jenalumar
- Carl Zeiss Jena Fluoval / Fluoval-2
- Carl Zeiss Jena Laboval Fluorescence

In the excitation path this filter does not work on its own. It is added to the main filter to cut off the red that filter passes and to narrow the excitation band further.

Description of this part for the microscope.

Carl Zeiss Jena
Model: B228g
Filter type: red-absorbing glass filter (the manufacturer calls it Rotsperrfilter)
Diameter: 32 mm
Colour: blue
Toughened version: yes

The "g" at the end of the designation stands for the German gehärtet, meaning toughened. The manufacturer gave it to filters meant to work right next to high-power lamps, especially HBO mercury burners, where ordinary glass does not withstand the high temperature.

Filters 32 mm in diameter can be used in most microscopes from many manufacturers. In Carl Zeiss Jena microscopes they can be used, among others, in the following fluorescence microscopes:
- Carl Zeiss Jena Jenamed Fluorescence (Fluoreszenz)
- Carl Zeiss Jena Jenalumar
- Carl Zeiss Jena Fluoval / Fluoval-2
- Carl Zeiss Jena Laboval Fluorescence

In the excitation path this filter does not work on its own. It is added to the main filter to cut off the red that filter passes and to narrow the excitation band further.

Description of this part for the microscope.

Carl Zeiss Jena
Model: B226g
Filter type: red-absorbing glass filter (the manufacturer calls it Rotsperrfilter)
Diameter: 32 mm
Colour: blue
Toughened version: yes

The letter "g" at the end of the designation is short for the German gehärtet, meaning toughened - the manufacturer gave it to filters meant to work right next to high-power lamps, especially HBO mercury burners, where ordinary glass does not withstand the high temperature.

Filters 32 mm in diameter can be used in most microscopes from many manufacturers. In Carl Zeiss Jena microscopes they can be used, among others, in the following fluorescence microscopes:
- Carl Zeiss Jena Jenamed Fluorescence (Fluoreszenz)
- Carl Zeiss Jena Jenalumar
- Carl Zeiss Jena Fluoval / Fluoval-2
- Carl Zeiss Jena Laboval Fluorescence

In the excitation path this filter does not work on its own. It is added to the main filter to cut off the red passed by that filter and to narrow the excitation band further.

Description of this part for the microscope.

Carl Zeiss Jena
Model: KP560
Type: interference excitation filter for fluorescence
Diameter: 32 mm
Mirror coating: yes

Filters 32 mm in diameter can be used in most microscopes from many manufacturers. In Carl Zeiss Jena microscopes they can be used, among others, in the following fluorescence microscopes:
- Carl Zeiss Jena Jenamed Fluorescence (Fluoreszenz)
- Carl Zeiss Jena Jenalumar
- Carl Zeiss Jena Fluoval
- Carl Zeiss Jena Laboval Fluorescence

Note - the mirrored surface gives away that this is an interference filter. With filters of this kind the angle to the incoming light is not indifferent and affects their parameters.

The coating on interference filters is sensitive to mechanical damage, for example scratches from improper storage or cleaning. The second enemy is time - several decades of work right next to the HBO lamp can cloud it or make it delaminate, which shows as patches or rainbow islands that do not disappear when you rotate it. In that case the best solution is to replace the filter with one like the one I offer here.

Description of this part for the microscope.

Carl Zeiss Jena
Model: KP490
Type: interference excitation filter for fluorescence
Diameter: 32 mm
Mirror coating: yes

Filters 32 mm in diameter can be used in most microscopes from many manufacturers. In Carl Zeiss Jena microscopes they can be used, among others, in the following fluorescence microscopes:
- Carl Zeiss Jena Jenamed Fluorescence (Fluoreszenz)
- Carl Zeiss Jena Jenalumar
- Carl Zeiss Jena Fluoval
- Carl Zeiss Jena Laboval Fluorescence

Note - this is an interference filter, which you can tell from the mirrored surface. For that reason the angle at which the filter sits relative to the incoming light matters and affects its parameters.

The coating on interference filters is sensitive to mechanical damage, for example scratches from improper storage or cleaning. Age is a separate matter - several decades of work right next to the HBO lamp can cloud it or make it delaminate, which shows as patches or rainbow islands that do not disappear when you rotate it. In that case the best solution is to replace the filter with one like the one I offer here.

Description of this part for the microscope.

Carl Zeiss Jena
Model: KP425
Type: interference excitation filter for fluorescence
Diameter: 32 mm
Mirror coating: yes

Filters 32 mm in diameter can be used in most microscopes from many manufacturers. In Carl Zeiss Jena microscopes they can be used, among others, in the following fluorescence microscopes:
- Carl Zeiss Jena Jenamed Fluorescence (Fluoreszenz)
- Carl Zeiss Jena Jenalumar
- Carl Zeiss Jena Fluoval
- Carl Zeiss Jena Laboval Fluorescence

Note - because this is an interference filter (it has a mirrored surface), the angle at which the filter sits relative to the incoming light matters and affects its parameters.

The coating on interference filters is sensitive not only to mechanical damage, for example scratches from improper storage or cleaning. Several decades of work right next to the HBO lamp can cloud it or make it delaminate, which shows as patches or rainbow islands that do not disappear when you rotate it. In that case the best solution is to replace the filter with one like the one I offer here.

Description of this part for the microscope.

the body only, without optics.

What is included: three parts - the lower sleeve that goes into the eyepiece tube of the head, the retaining ring that holds the lenses inside the housing, and the upper sleeve with the engraving
Material: all parts of the housing are made of plastic - this is unusual, because in eyepieces of this class the bodies are normally metal
Marking on the body: ZEISS West Germany CPL W 10x/18, number 464022-9901
Mounting diameter: 23.2mm - a standard eyepiece tube

This housing is not a replacement part for the microscope. It is a part for repairing a microscope eyepiece - and that eyepiece can be used in various microscopes, even from manufacturers other than Carl Zeiss. A few microscopes this eyepiece can be used with are listed in the "compatibility" section, but this is definitely not a complete list. It is safe to assume that the Zeiss CPL W 10x/18 eyepiece can be used with any microscope from any manufacturer whose head has a 23.2 mm eyepiece tube diameter.

The plastic this eyepiece housing is made of can be damaged in various ways. It often cracks, gets scratched, or deforms and partly melts from heat - the proximity of a bulb, a lamp or a soldering iron is enough, and very often the culprit is simply the cigarette held in the same hand that turns the focus knobs. In that case - especially when the optics inside are still intact - you can simply replace the housing with the one offered here.

Here you will find the top lens for this eyepiece: https://www.microscopeparts.eu/part/99913.

Description of this part for the microscope.

repairing the eyepiece.

Lens position: this is the topmost lens of the microscope eyepiece, called the eye lens
Lens construction: this is a cemented lens, flat on one side and convex on the other
Matching eyepiece: this is the lens from the Zeiss West Germany CPL W 10x/18 eyepiece, model number 464022-9901

This lens is not a replacement part for the microscope. It is a part for repairing a microscope eyepiece - and that eyepiece can be used in various microscopes, even from manufacturers other than Carl Zeiss. A few microscopes this eyepiece can be used with are listed in the "compatibility" section, but this is definitely not a complete list. It is safe to assume that the Zeiss CPL W 10x/18 eyepiece can be used with any microscope from any manufacturer whose head has a 23.2 mm eyepiece tube diameter.

Description of this part for the microscope.

adjustment ring fitted, which lets you correct the refractive error of one eye and focus the image properly. It is mounted on the left side of the microscope head, and without certain DIY modifications it cannot be moved to the right side.

This particular tube was removed from an Olympus BH2-BI30 binocular head, but it should also fit, among others, the following microscope heads with tubes for eyepieces of 23.2 mm diameter:
- Olympus BH2-BI30
- Olympus BH2-TR30
- Olympus BH2-TBI
- Olympus BH2-TTR
- Olympus BH2-TET

Before you decide to use it to repair a head other than the one it was removed from, I recommend checking it first with specialists on forums or groups devoted to Olympus microscopes.

This tube with diopter adjustment is not a spare part for the microscope itself. It is a repair part for an Olympus microscope head - and that head can sit on various microscopes, even on instruments from manufacturers other than Olympus. The most important microscopes this head is most often used with are listed in the "compatibility" section, but this is by no means a complete list.

The irreplaceable Carl Hunsinger has written an excellent service manual for the BH2-BI30 microscope head (https://www.alanwood.net/downloads/olympus-bh2-bi30-binocular-head-repair.pdf) and for the BH2-TR30 (https://www.alanwood.net/downloads/olympus-bh2-tr30-trinocular-head-repair-manual.pdf).

Here are the microscope models in which the heads this tube fits are most often used:
- Olympus BH-2 BHS
- Olympus BH-2 BHT
- Olympus BH-2 BHTU
- Olympus IMT-2

A note on the eyepiece tube diameter: the mounting diameter for the eyepieces is 23.2 mm, but some sources state 23 mm or 23.5 mm - that is a rounded measurement, and it is still one and the same tube.

Description of this part for the microscope.

board carrying the two momentary pushbuttons:
- 452112-9036
- S8/10
- 452112-3036 L
- S9/11

Marking on the cable connecting the microswitches: 451331-8094

The connector plugs into the SCA socket on the central distribution board 451331-9320 (https://www.microscopeparts.eu/part/99909).

I was not able to confirm it, but it is possible that these parts also fit the inverted Zeiss Axiovert 135M microscope. Before you decide to use them in the Axiovert 135M model, please check this on forums or groups devoted to Zeiss microscopes.

Description of this part for the microscope.

sensors and drives in the motorized inverted Zeiss Axiovert 100M microscope are connected.

Markings on the board:
- 451331-9320
- 3320 B
- DL SP1 SP2 SHUT
- SCA
- 3320 L
- Carl Zeiss Jena

ATTENTION: This is a board for a microscope branded by Zeiss (Oberkochen, West Germany). The board, however, carries the "Carl Zeiss Jena" logo. This is not a mistake - this board was made in week 31 of 1997, already after the German reunification, when the Jena plant was producing for the entire Carl Zeiss group.

IMPORTANT: in the photo you can see that in every pin block onto which a connector is plugged, one pin is missing. This is not damage, this is not a broken-off pin - this is the original factory condition. It is supposed to look like this.

I was not able to confirm it, but it is possible that this part also fits the inverted Zeiss Axiovert 135M microscope. Before you decide to use the electronic board shown here in the Axiovert 135M model, please check this on forums or groups devoted to Zeiss microscopes.

In the last photos the arrow shows where this part sits in the Zeiss Axiovert 100M microscope, so that you can identify it without any doubt.

Description of this part for the microscope.

controls the shutter. It is not a complete shutter. The module contains:
- a milled aluminium bracket that fits inside the microscope housing
- the Kuhnke D 23 LOL -F 24VDC 100%ED rotary solenoid
- two HOA2001-1 optical sensors
- the wiring and the connector to the Zeiss 451331-9320 board

I was not able to confirm it, but it is possible that this part also fits the inverted Zeiss Axiovert 135M microscope. Before you decide to use the electronic module shown here in the Axiovert 135M model, please check this on forums or groups devoted to Zeiss microscopes.

In the last photos the arrow shows where this part sits in the Zeiss Axiovert 100M microscope, so that you can identify it without any doubt.

Description of this part for the microscope.

tube. The metal casting - the one with the eyepiece tube that the prism holder is attached to - carries the number AB0304.

This particular prism was removed from an Olympus BH2-BI30 binocular head, but it should also fit, among others, the following microscope heads with eyepiece tubes for eyepieces of 23.2 mm diameter:
- Olympus BH2-BI30
- Olympus BH2-TR30
- Olympus BH2-TBI
- Olympus BH2-TTR
- Olympus BH2-TET

Before you decide to use it to repair a head other than the one it was removed from, I recommend checking it first with specialists on forums or groups devoted to Olympus microscopes.

The prism shown here sits in its original holder, and the whole assembly is attached to the right eyepiece tube (casting AB0304) - and that is exactly what I am offering, as a complete unit.

This prism is not a spare part for the microscope itself. It is a repair part for an Olympus microscope head - and that head can sit on various microscopes, even on instruments from manufacturers other than Olympus. The most important microscopes this head is most often used with are listed in the "compatibility" section, but this is by no means a complete list.

The irreplaceable Carl Hunsinger has written an excellent service manual for the BH2-BI30 microscope head (https://www.alanwood.net/downloads/olympus-bh2-bi30-binocular-head-repair.pdf) and for the BH2-TR30 (https://www.alanwood.net/downloads/olympus-bh2-tr30-trinocular-head-repair-manual.pdf).

Here are the microscope models in which the heads this prism fits are most often used:
- Olympus BH-2 BHS
- Olympus BH-2 BHT
- Olympus BH-2 BHTU
- Olympus IMT-2

A note on the eyepiece tube diameter: the mounting diameter for the eyepieces is 23.2 mm, but some sources state 23 mm or 23.5 mm - that is a rounded measurement, and it is still one and the same tube.

Description of this part for the microscope.

The metal casting - the one with the eyepiece tube that the prism holder is attached to - carries the number AB0303.

This particular prism was removed from an Olympus BH2-BI30 binocular head, but it should also fit, among others, the following microscope heads with eyepiece tubes for eyepieces of 23.2 mm diameter:
- Olympus BH2-BI30
- Olympus BH2-TR30
- Olympus BH2-TBI
- Olympus BH2-TTR
- Olympus BH2-TET

Before you decide to use it to repair a head other than the one it was removed from, I recommend checking it first with specialists on forums or groups devoted to Olympus microscopes.

The prism shown here sits in its original holder, and the whole assembly is attached to the left eyepiece tube (casting AB0303) - and that is exactly what I am offering, as a complete unit.

This prism is not a spare part for the microscope itself. It is a repair part for an Olympus microscope head - and that head can sit on various microscopes, even on instruments from manufacturers other than Olympus. The most important microscopes this head is most often used with are listed in the "compatibility" section, but this is by no means a complete list.

The irreplaceable Carl Hunsinger has written an excellent service manual for the BH2-BI30 microscope head (https://www.alanwood.net/downloads/olympus-bh2-bi30-binocular-head-repair.pdf) and for the BH2-TR30 (https://www.alanwood.net/downloads/olympus-bh2-tr30-trinocular-head-repair-manual.pdf).

Here are the microscope models in which the heads this prism fits are most often used:
- Olympus BH-2 BHS
- Olympus BH-2 BHT
- Olympus BH-2 BHTU
- Olympus IMT-2

A note on the eyepiece tube diameter: the mounting diameter for the eyepieces is 23.2 mm, but some sources state 23 mm or 23.5 mm - that is a rounded measurement, and it is still one and the same tube.

Description of this part for the microscope.

attached from the inside to the dovetail that holds the head on the microscope stand.

Important: this is the prism only - without the cast metal holder the prism is supposed to be glued into.

The irreplaceable Carl Hunsinger has written an excellent service manual for this microscope head: https://www.alanwood.net/downloads/olympus-bh2-bi30-binocular-head-repair.pdf.

This prism is not a spare part for the microscope itself. It is a repair part for the Olympus BH2-BI30 microscope head - and that head can sit on various microscopes, even on instruments from manufacturers other than Olympus. The most important microscopes this head is most often used with are listed in the "compatibility" section, but this is by no means a complete list.

Description of this part for the microscope.

from a Zeiss 452143 microscope head - but most probably it also fits other heads of the Zeiss AIM systems and of Zeiss Axioplan 2 microscopes, for example:
- Zeiss 452142
- Zeiss 452143
- Zeiss 452145
- Zeiss 452146

These photo-trino heads which I listed above are used, directly or through suitable adapters, among others in the following microscopes:
- Zeiss Axioplan 2
- Zeiss Axioskop 2
- Zeiss Axiophot 2
- Zeiss AIM
- Zeiss Axiotech
- and probably others

Basic parameters of this tube:
Mounting to the trinocular head: with 3 screws
Overall length: 50 mm
Length protruding above the housing of the head: approx. 25 mm
Inner diameter: 30 mm - for use with photo / projection eyepieces of this diameter
Camera installation possible: yes, a so-called USB eyepiece can be mounted in this tube
Centering: yes, the mounted camera or eyepiece can be centered with three centering screws

VERY IMPORTANT: this short tube (it can also be called a holder of the photo projection eyepiece) is screwed to the head with 3 (three) screws. In the photo only 2 (two) are visible - and this is exactly the item I am offering here, because I lost one of the screws. It is a minor thing - but it has to be mentioned.

In the last photo an arrow shows where this part is located in the head, so that it can be identified without any doubt.

Description of this part for the microscope.

has three light splitting modes:
- 0 / 100
- 50 / 50
- 100 / 0

The prism sits on a carriage and slides on rails - and this knob shown here is what moves it.
In the last photo an arrow shows where this part is located in the head, so that it can be identified without any doubt.

This particular knob was removed from a Zeiss 452143 microscope head - but most probably it also fits other heads of the Zeiss AIM systems and of Zeiss Axioplan 2 microscopes, for example:
- Zeiss 452142
- Zeiss 452143
- Zeiss 452145
- Zeiss 452146

These photo-trino heads are used, directly or through suitable adapters, among others in the following microscopes:
- Zeiss Axioplan 2
- Zeiss Axioskop 2
- Zeiss Axiophot 2
- Zeiss AIM
- Zeiss Axiotech
- and probably others

Description of this part for the microscope.

lens
Diameter including the mount: 38.5 mm
Thread: M36 x 0.75 (that is, 36 mm in diameter)
Anti-reflective coating: yes

This particular lens was removed from the Carl Zeiss P/N 45 21 43 head. The same tube lens model is fitted in various head models for Zeiss Axioplan 2 microscopes:
- Zeiss 452142
- Zeiss 452143
- Zeiss 452145
- Zeiss 452146

The Zeiss 452149 tube lens is necessary, among other things, to use infinity corrected Zeiss microscope objectives on microscopes of other manufacturers - including those with a finite 160 mm tube length. It is also very often used in super macro photography, to connect infinity corrected objectives to a photo camera.

This part can be the answer to the following questions:
- What to do when the Zeiss 452149 tube lens is damaged, scratched or of poor quality?
- Can Zeiss objectives be used on a microscope from another manufacturer?
- Can infinity corrected objectives be used on a 160 mm type microscope?
- How to take super macro photos using infinity corrected microscope objectives?

Description of this part for the microscope.

the housing can crumble, crack or break. The remedy for such a problem is then the replacement of the whole head or of this housing part only.

Inside the housing there is the eyepiece shutter together with the knob for sliding it.

This is the housing of the head, not the housing of the microscope. The 452143 head itself fits directly on the Carl Zeiss Axioplan 2, Axioplan 2 imaging and Axiophot 2 microscopes, and with the 452969 adapter it is also used on Axioskop 2 stands. This part therefore fits every 452143 head, regardless of which microscope that head is working on.